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Finding the Fourth Proportional to 399,450,691.89, 551,258,978.94 and 223,238,682.06

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Solution

The fourth proportional to 399,450,691.89, 551,258,978.94 and 223,238,682.06 is: 308,078,895.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,450,691.89 : 551,258,978.94 = 223,238,682.06 : x
  2. Step 2: Convert to fraction form
    399,450,691.89/551,258,978.94 = 223,238,682.06/x
  3. Step 3: Cross multiply
    399,450,691.89x = 551,258,978.94 × 223,238,682.06
  4. Step 4: Simplify right side
    399,450,691.89x = 123,062,327,932,306,912
  5. Step 5: Solve for x
    x = 123,062,327,932,306,912/399,450,691.89
  6. Step 6: Final answer
    x = 308,078,895.42

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.